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Ultraviolet and x-ray detection of the 56 peg system (ko 2p + wd)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Basri, G. Stencel, R. E. Helfand, D. Linsky, J. L. Schindler, M. |
| Copyright Year | 1982 |
| Description | Both IUE short and long wavelength exposures of the 56 Peg system are discussed. This mild barium star has an X-ray luminosity of 3 x 10 to the 31st power ergs/1, comparable to the rapidly rotating RS CVn binary systems, yet lies in a region of the HR diagram where stellar X-rays are generally not observed. This cool, bright giant is not a rapid rotator and the key to understanding its emission lies in the recent discovery of its white dwarf companion. Accretion onto the white dwarf of approximately 0.1% of the stellar wind of the primary is sufficient to power an X-ray source of the observed luminosity. Reprocessing of the X-rays in the cool dense stellar wind explains the origin of the UV emission line spectrum, and may explain the time varying asymmetry of the Mg 2 kappa line profile that is observed. Graphs which show observed fluxes and wavelengths are discussed. |
| File Size | 597260 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820026441 |
| Archival Resource Key | ark:/13960/t41s1mw51 |
| Language | English |
| Publisher Date | 1982-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Stellar Spectra Stellar Winds Barium Lyman Alpha Radiation Giant Stars Emission Spectra Binary Stars Ultraviolet Spectra Iue Astronomical Spectroscopy X Ray Spectra Stellar Coronas Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
